But along with that news comes more questions: Issa and Sen. Chuck Grassley (R-Iowa) are demanding to know why a top ATF official involved in Operation Fast and Furious remains on paid leave from ATF -- while simultaneously drawing a six-figure salary from J.P. Morgan, a major investment bank.

In a letter to the acting head of the Bureau of Alcohol, Tobacco, Firearms and Explosives, Issa and Grassley asked why the Justice Department would approve such a special arrangement for Bill McMahon.

“Under any reading of the relevant personnel regulations, it appears that ATF management was under no obligation to approve this sort of arrangement,” wrote Issa and Grassley. “Given McMahon’s outsized role in the Fast and Furious scandal, the decision to approve an extended annual leave arrangement in order to attain pension eligibility and facilitate full-time, outside employment while still collecting a full-time salary at ATF raises a host of questions about both the propriety of the arrangement and the judgment of ATF management.”

Issa and Grassley say the ATF has made it possible for McMahon to "double dip for nearly half a year by receiving two full-time paychecks -- one from the taxpayer and one from the private sector."

They noted that the treatment of McMahon is "in sharp contrast" to how the ATF has treated whistleblowers such as Special Agent John Dodson, "who is told he must wait until the Inspector General’s report is complete before the agency will even consider his simple request for a statement retracting the false statements made about him by agency leadership.”